part_of
part of
portion of plant tissue
seed
endosperm
endosperma (Spanish, exact)
A portion of plant tissue (PO:0009007) which is a maximal portion of nutritive plant tissue in a seed (PO:0009010).
内胚乳、胚乳 (Japanese, exact)
PO_GIT:149
plant_anatomy
PO:0009089
albumen (exact)
In angiosperms the endosperm is usually triploid and formed after fertilization by the fusion of one gamete with the polar nucleus (GO:0043078); sometimes diploid or polyploid.